Steve, I just saw this! Hot spot for Dubz near Portland? Larsons back yard was my first thought too!
Pier is always good but to close the course which is most likely what would need to be done it is cost prohibited. Timber is of course an option but a lot of events are held there and folks get tired of seeing the same ol', same ol'. Milo is a great option but a lot will be going out there in May preparing for the Fling. Adair is a fantastic choice but a bit further away. The place everyone is just itching for an event is Hornings Meadow Ridge. It's big and sprawling and challenging and would make a heck of a good Dubz venue. Hope this helps and be sure to give me a shout out to help.